Tutorial: Installation of WVO Heaters

Remove blue plugs from
heat exchanger. Clean all parts prior to
assembly making sure there is no dust or
debris or oil residue. Orient gasket like
this:

Set depth of 4” nipple
into remote filter adapter (thing with
three screw holes in it) with red Loctite
or epoxy glue (follow instructions with
what you are using) to a depth of 3/8” to ½”.
Attach filter and let the glue harden overnight.
Attach fittings using Teflon tape. Make
sure there are no Teflon tape shreads left
dangling after fitting installation. Mount
assembly as close as possible to fuel injection
pump (before fuel injection pump) and water
pump in a good location. Remove existing
diesel fuel pre-filter if your engine has
one. The one-quart FRAM filter is your
new Heavy-Duty pre-filter to your vehicles
final filter (many other filters having
better filtering efficiency/capacity are
available. Buy enough 5/8” ID heater
hose and 3/8” ID fuel line hose,
long enough to make final connections.
Remove the hose from the water pump that
goes to your heater core inside your vehicle.
Attach new hose and rout to the WVO heater;
from the WVO heater then to the hose that
was disconnected (you may need additional
fittings). If your vehicle has a heater
valve in line with the 5/8” heater
hose that keeps hot water from reaching
the heater core when heater is not used,
then you will need to install a tee fitting
prior to the heater valve that bypasses
the heater valve so that hot water gets
to the WVO heater all the time. Otherwise
hot water would circulate thru the WVO
heater only when you turned the heat on
inside the vehicle. Then connect inline
the 3/8” fittings into the fuel line
prior to your existing final fuel filter
(note in/out arrows on top of the remote
filter adapter). Prime the assembly; you
will need to get all the air out of the
assembly for your engine to start again.
Follow the priming instructions specific
to your vehicle. Clamp all connections
with hose clamps.

Electric models are easy
to install; make sure you have good electrical
connection. The 12 Volt positive wire must
be connected to a switched circuit (key
out, power off). 240 Watt models have a
gray wire that is connected to the ignition
switch that controls the power relay. The
electric heat should be used for a maximum
of 20 seconds at time of start up; the
heaters are OK to run when the engine is
running and the fuel is flowing and cooling
the heaters. Establish a good ground to
complete the circuit.

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